172 THE ENTOMOLOGIST’S WEEKLY INTELLIGENCER. 
larva makes its appearance later than 
most of its congeners. The larva may 
he found from about the middle of July 
till the middle of August, feeding on 
the umbels of carrots and parsneps, and 
sometimes it is so plentiful that it be- 
comes a highly injurious garden insect, 
as in the gardeu of Herr Bouche, at 
Berlin, where it occurred by thousands. 
The umbels attacked by it generally be- 
come discoloured towards the centre, but 
frequently it leaves an umbel in which it 
has been at work for some time to com- 
mence operations in a fresh one. Pro- 
fessor Zeller has also met with it on 
Pimpinella Saxifraga, and observes that, 
from its mode of operation, it can readily 
he distinguished from the larva of De- 
pressaria Pimpinellce on the same plant, 
that larva forming its tubes perpendicu- 
larly amongst the stalks of the umbel, 
whereas the larva of Depressella con- 
structs its silken tubes amongst the sur- 
face of the umbel. The larva is full fed 
about tbe middle of August, and spinning 
a slight cocoon frequently changes to the 
pupa state without quitting the umbel. 
Bouche states that some larvae enter the 
stems and there change to pupae, but 
that such pupae remain unchanged till 
the following spring. Early in September 
the perfect insect makes its appearance, 
and may be met with during that and 
the following months, and agaiu after 
hybernation in the spring. 
H. T. Sxainton. 
LABELLING INSECTS. 
To the Editor of the ‘ Intelligencer.' 
Sir, — I beg again to trouble you with 
a few remarks, as Mr. Wallace seems to 
have totally misunderstood my letter. 
In saying “ I could refer to any insect s 
locality immediately by inspecting the 
numeral underneath,” it was uot my 
meaning that it would be necessary to 
take up the insect for that purpose. My 
Coleoptera being mostly mounted on 
card, the numeral appears almost on a 
level with the card, immediately behind 
the pin ; consequently they are much 
easier to be seeu than Mr. Wallace’s, not 
even requiring the drawer to be held at 
an angle. 
Mr. Wallace seems to have hit upon a 
very happy method of labelling insects, 
as the numeral does not even require 
looking at to determine the insect’s posi- 
tion, for, as they are already arranged 
from No. 1 downwards, a very clear 
memory is not required to see whether 
the number to any particular insect is 
1 or 5. Surely the trouble of label- 
ling might be altogether dispensed 
with. 
Again, in Mr. Wallace’s scheme either 
two journals are necessary, as he himself 
confesses, or the unknown ones — those 
which most easily slip the memory (I am 
writing for Coleopterists as well as Lepi- 
dopterists) — are neglected. Much extra 
time is also taken up in making two 
entries for one insect, and the “ un- 
known” journal, owing to the many 
erasures, must be a very unsightly ob- 
ject. 
I see no other inconvenience in my 
scheme, more than in Mr. Wallace’s, in 
referring to tbe capture of any insect, 
thau that my numerals require looking 
at, while, from the simplicity of his 
arrangement, his do not. 
My journal is arranged numerically, 
not specifically, and therefore there can 
be no dilliculty in referring to any 
number, whether 300 or 10,000; for 
the situation of numerals is found much 
